.wrapper{
    margin:0  auto;
    width: 803px;
}
.header{
    height: 100px;
}
.header .wrapper{
    padding-top: 29px;
    display:flex;
}
.logo a{
    display: block;
   width: 137px;
   height: 52px;
   background-image: url(../images/logo.jpg);
   font-size: 0;
}
.nav{
    margin-left: 30px;
}
.nav ul{
    display: flex;
    
}
.nav li{
    margin-right:14px ;
}
.nav li a{
    display: block;
    padding: 5px 15px;
    line-height: 27px;
    font-size: 16px;
    width: 78px;
}
.nav li .active,
.nav li a:hover{
 border-bottom: 2px solid #00a4ff;
}
.search{
    display: flex;
    width: 220px;
    height: 40px;
    background-color: #f3f5f7;
    border-radius: 20px;
    margin-left: 20px;
    padding-left: 15px;
    padding-right: 6px;
}
.search input{
    flex: 1;
    border: 0;
    background-color: transparent;
    outline: none;
}
.search input::placeholder{
    font-size: 14px;
    color: #999;
}
.search a{
    align-self: center;
    width: 16px;
    height: 16px;
    background-image: url(../images/search.png);
    margin-right: 5px;
}
.user{
    margin-left: 32px;
    margin-top: 4px;
}
.user img{
    margin-right: 7px;
    vertical-align: middle;
}
.user span{
    color: #666;
    font-size: 14px;
}
.Banner{
    height: 420px;
    background-color: #0092bc;
}
.Banner .wrapper{
    display: flex;
    justify-content: space-between;
    width: 803px;
    height: 475px;
    margin: 0 auto;
    background-image: url(../uploads/bannar2.jpg);
    background-position: center;
    background-repeat: no-repeat;
}
.Banner .left{
    padding: 3px 20px;
    width: 191px;
    height: 420px;
    background-color: rgba(0, 0, 0,0.42);
}
.Banner .left a{
    display: block;
    height: 46px;
    line-height: 46px;
    color: #f3f5f7;
    font-size: 16px;
    background-image: url(../images/right.png);
    background-position: right center;
    background-repeat: no-repeat;
}
.Banner .left a:hover{
    background-image: url(../images/right-hover.png);
    color: #00a4ff;
}
.Banner .right{
    width: 218px;
    height: 305px;
    background-color: #209dd5;
    margin: auto 0;
    border-radius: 10px;
}
.Banner .right h3{
     margin-left: 14px;
     height: 48px;
     line-height: 48px;
     color: #f3f5f7;
     font-weight: 400;
}
.Banner .right .content{
    height: 257px;
    border-radius: 10px;
    background-color: #fff;
    padding: 14px;
}
.Banner .right .dl{
    margin-bottom: 12px;
}
.Banner .right dt{
    font-size: 14px;
    margin-bottom: 8px;
    line-height: 20px;
    font-weight: 700;
}
.Banner .right dd{
    font-size: 12px;
    line-height: 16px;
    color: #00a4ff;
    margin-bottom: 8px;
}
.Banner .right a{
    display: block;
    width: 190px;
    height: 32px;
    background-color: #00a4ff;
    border-radius: 15px;
    margin-top: 30px;
    text-align: center;
    line-height: 32px;
    font-size: 14px;
    color: #fff;
}
.recommend{
    background-color: #f3f5f7;
    height: 620px;
   
    
}

.recommend .recommendheader{
    height: 60px;
    line-height: 60px;
    display: flex;
    justify-content: space-between;
}
.recommend h3{
    font-size: 21px;
    font-weight: 400;
    margin-left: 198px;
}
.recommend .more{
    background-image: url(../images/more.png);
    font-size: 14px;
    color: #999;
    background-repeat: no-repeat;
    background-position: right center;
    padding-right: 20px;
    margin-right: 200px;
}
.course ul{
    margin: 0 auto;
    width: 803px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between  ;
}
.course li{
    margin-bottom: 14px;
    width: 150px;
    height: 240px;
    background-color:white;
}
.pic{
    height: 140px;
}
.pic img{
    width: 100%;
    height:100%;
}
.course li .text{
    padding: 10px;
}
.course li .text h4{
    height: 50px;
    line-height: 20px;
    font-size: 14px;
    font-weight: 400;
}
.course li .text p{
    font-size: 14px;
    line-height: 20px;
    color: #999;
    
}
.course li .text p span{
    color: #fa6400;
}

.footer {
    margin-top: 60px;
    height: 273px;
    background-color: #fff;

}
.footer .wrapper{
    display: flex;
    justify-content: space-between;
}
.footer .left{
    width: 400px;
}
.footer .logo {
    display: block;
    height: 52px;
   background-image: url(../images/logo.jpg);
   font-size: 0;
    width: 229px;
} 
.footer .text{
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 12px;
    line-height: 17px;
    color: #666;
    
}

.footer .download{
    display: block;
    width: 120px;
    height: 32px;
    border:  solid 2px;
    border-color: #00a4ff;
    color: #00a4ff;
    text-align: center;
    font-size: 16px;
}
.footer .right{
    display: flex;
}
.footer .right .introduce{
    margin-right: 100px;
}
.footer .right ul {
    margin-top: 15px;
}
.footer .right li{
    margin: 5px;
    
   
}
.footer .right a{
    font-size: 14px;
    color: #666;
}